Motor-controller.



Ilo. 68|,269. Patented Aug. 27; I90I.

R. W. SCUTT.

IUTDII GDITINLLER.

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lo. 68|,269- hunted Aug. 27, |901.

R. VI. SCOTT.

IUTOII COITRULLER.

(Appuntam nu. 1o, 1900.)

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ATTORNEY UNITED STATES PATENT GEEIOE.

RUMsEY w. soO'r'r, or NEw YORK, N. Y.

MOTOR-CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 681,269, dated August27, 1901,

Application tiled Deoemher 19, 1900. Serial No. 40.349. (No model.)

T0 @ZZ whom t may concern.-

Be it known that I, RUMsEY W. SCOTT, a citizen of the United States,residing at New York, State of New York, have invented certain new anduseful Improvements in Motor- Oontrollers, ot' which the following is aclear, full, and exact description.

My invention relates to an electric-motor controller', and particularlyto a controller for use with electric elevators; and my object is toproduce a device which is simple, durable, eiioient, and which will noteasily get out of Order.

Other subordinate advantages of my invention will be apparent from theaccompanying drawings and description, which disclose one embodiment ofthe invention.

My invention will be defined in the claims.

In the preferred embodiment shown in the drawings, Figure 1 shows a sideelevation of my controller in place on a slate board; Fig. 2, a diagramof connections, and Fig. 3 a detail of a car and the rack-actuatingmechanism.

In the drawings, illustrating the preferred embodiment of my invention,I have shown my invention applied to an elevator mechanism.

1, Fig. 3, is a car traveling between suitable guideways 2 2 in theelevator-well and raised by an electric motor, preferably compoundwound, whose windings are shown in diagram in Fig. 2. In order toregulate the supply of current to the armature of the motor when thesame is started or reversed, I have provided a rheostat in themotor-circuit and a contact-piece also in said circuit, which passesover the rheostat to cut out the resistances thereof. I preferably alsohave a movable stop for the contact-piece, which is adapted to controlthe position of the oontact-piece on the rheostat, and thus control thespeed of the motor.

In the drawings the motor is shown in Fig. 2, in which 3 represents thearmature-winding, 4 the series field-winding, and 5 the shuntfield-coils.

7 is a suitable resistance, in this case a bank ot incandescent lamps,short-circuited across the terminals of the shunt field-coils to takethe kick of the shunt when it is Opened. The rheostat preferablyconsists of a series of resistances 8 S, between stationary terminalblocks 9 9, mounted on a suitable slate 10 and arranged in the arc of acircle. The lower end of the rheostat is preferably connected to onemain through the armature-circuit and the other main being connected toan arc-shaped contact-bar 11.

12 is the movable contact-piece, which may be carried on and insulatedfrom (see 12a` Fig. 2) an arm 13, pivoted at the center 13 Of the are ofthe terminals 9 9, and which closes the motor-circuit through therheostat.

AAs the contact-piece is moved forward over the rheostat from theposition shown in full lines in Fig. 1 it will cut resistances 8 8 outof the motor-circuit and increase the 4speed of the motor.

14 is a movable stop which holds the arm 13 from moving forward over therheostat and controls the position of the contact-piece 12 on therheostat. In the present embodiment I have connected the movable stop14. with the car by a shipper-rope 15, Fig. 3, passing through the carand over a wheel 16, carrying a toothed wheel 17, which meshes with areciprocating rack 18. cause the movable stop 14, and therefore thecontact-piece 12, to move downward on a movement of the shipper-rope andrack in either direction, I have provided a wheel 19, meshing with therack and preferably carrying a crank-pin 20, which is connected to stop14 by the link 21.

21 is a bar sliding in a guideway 2lb and pivoted to link 21 by stop-pin1-1 for guiding the movement of the stop 14. As the rack is moved ineither direction from the position shown in full lines in Fig. 1 thestop 14. will .be moved downward@7 and will cause the arm 13 andcontact-piece l2 to move forward over the rheostat. f

The shipper-rope and rack have preferably only a short movement, and inorder that the contact-piece 12 shall not cut out the resistances in themotor-circuit too quickly when the rope is pulled I have made thecontactpiece adapted to automatically pass over the rheostat-that is, itis not positively connected with the shipper-rope, but movesindependently of the same in the present embodiment by gravity. As theshipper-rope is quickly pulled the stop 1-1 will move away 1n order to YIOO from 'the arm 13, and the arm will start to fall and its motion isregulated by, preferably, a dash-pot 22. It makes no difference,therefore, how quickly the shipper-rope or rack18 is moved the arm 13and contact-piece 12 will always move slowly, thus avoiding a suddenrush of current through the motorarmature. 23 is a spring attached tobar 2la and serving to counterbalance in part the weight of the partsand also to tend to keep the parts normally in the position shown inFig. 1.

In order to reverse the direction of current in the motor-circuit, Ihave provided a pivoted switch-arm 23, whose ends are insulated fromeach other, as seen at 24 in Fig. 2. These ends move into spring-jaws 2528 and '29 32. To throw the switch, I prefer to use a pivoted cam 33,having arms 34 35, forming faces 36 37, making an angle with each other.Located between these cam-faces is a movable actuating part, preferablyconsist-` ing of a roller-stud 38, connected with the shipper-rope by anarm 39, fixed to the rack 18. As the shippe-rrope and rack are moved inone direction or the other the stud 38 will strike the cam-face 36 or 37and rock the cam and throw the reversing-switch into engagement with thespring terminals 25 28 or 29 32.

I prefer not to have the reversing-switch closeor open themotorcircuit,andin this embodiment I have provided a main switch toaccomplish this. As shown in the drawings, 40 is one terminal of themotor-circuit and preferably consists of xed springjaws. T-he otherterminal may be a contact portion 41, adapted to enter between saidjaws, and I prefer to mount it on an arm 42, pivoted to the slate at42a. As the main switch should be closed by a pull of the shipper-ropein either direction from the position shown in full lines in Fig. 1 andopened by a pull in the opposite direction I have provided a pluralityof cams, in the present embodiment formed by pivoted arms 43 44, havingcamfaces 45 46, making an angle with each other and having intermeshingsegmental gears 47 48, so that when one arm is moved the other will alsobe moved in the same direction.

49 is an operating part consisting of a roller pivoted to a head 50,which is supported on the coiled spring 51. The roller 49y is connectedto the shipper-rope by the arm 39 on the rack 18, which carries spring51.

52 is a projection from cam 43 and carries pins 53 54, standing oneither side of arm 42 and forming a connection between cam 43 and thearm for moving the same. As rack 18 is moved in one direction or theother from the position shown in full lines in Fig. 1 the rollers 38 and49 will strike cam-face 45 or 46 and close the reversing-switch and alsothe main switch. In order to close the reversing,

switch first, I have cut away the cam-faces 45 andA 46 at 45a 46aslightly more than in cam 33. As rack 18 is moved to the left from theposition shown in full lines in Fig.

1 the reversing-switch will be closed first and then the main switch. Asthe rack is moved to the right from the dotted position in Fig. 1 thearm 42 will be moved to the left. In order to make a quick breakb'etween contact portion 41 and the spring-jaws 40 to avoid arcing, Ihave provided a spring which automatically exerts its force on arm 42 tosnap it to the left before the Contact portion 41 leaves the terminal40. In this ernbodiment 55 is the spring attachedto the arm at one endand at the other to the slate at 56; a point beyond the pivot of thearm, Fig. 2. As the arm moves to the left from the dotted position ofFig. 1 it will pass the dead-center of the pull of spring 55 beforecontact portionA 41 leaves jaws 40. Consequently the spring will thensnap the arm to the left and make a quick break of the motor-circuit.

In order to hold the arm 13, carrying contact-piece 12, from movingforward over the rheostat while the motor-circuit is open, I preferablyuse a trigger 57, sliding in a guideway 58 and connected to the cam 44by a link 59. The trigger is normally in the position shown in fulllines in Fig. 1, below pin 60 on arm 13, but when the main switch isclosed the trigger is retracted.

It often happens that the motor-circuit is opened by the blowing of afuse or from other cause, and to prevent the arm 13 moving forward overthe rheostat while the circuit is open I have provided a lock thereforwhich operates as soon as the circuit is broken. In

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the present embodiment this consists of a solenoid 61, carried on arm 13and having a core 62, which is provided with, preferably, a plurality ofteeth engaging, preferably, a segment 64 of stationary teeth. When thereversing-switch is closed the circuit through the solenoid is closedand the arm 13 unlocked; but if the motor-circuit is open the lockinstantly operates. The arm cannot then be moved to cut out any moreresistance until the motor-circuit is again closed.

I am aware that many changes may be made in the constructions hereinshown and described without departing from the spirit of my invention,and I therefore do not desire to belimited to the embodiment hereindisclosed.

1. In a motor-controller in combination, a rheostat in themotor-circuit, including a series of terminals and resistances betweenthe same, a switch in said circuit including a pivotedarm carrying acontact-piece adapted to move over said series of terminals to cut outthe resistances of said rheostat, a dash-pot to control the speed ofmovement of said arm, a lock to prevent the forward movement of saidswitch, and means including a solenoid carried by said arm and having acore adapted to engage a stationary series of teeth, and a connectionfrom the motor-circuit through said solenoid to automatically unlock thesame when the motor-circuit is closed.

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2. In a motor-controller in combination, a rheostat in the motor-circuitincluding a series of terminals and resistances between the same, aswitch in said circuit including a pivoted arm carrying a contact-pieceadapted to move forward over said series of terminals by gravity to cutont the resistances of said rheostat, a dash-pot to control the speed ofmovement of said arm, a lock to prevent the forward movement of saidswitch, and means including a solenoid carried by said arm and having acore adapted to engage a stationary series of teeth, and a connectionfrom the motor-circuit through said solenoid to automatically unlock thesame when the motor-circuit is closed.

3. In a motor-controller in combination, a rheostat in themotor-circuit, a switch also in said motor-circuit and adapted toautomatically move over the same and cnt out resistances therein, a lockadapted to hold said switch from passing over said rheostat, a pluralityof cams having faces making an angle with each other, an operating partlocated between said faces and movable in either direct-ion to strikeand move one of said cams, and a connection therefrom to said lock torelease the same when one of said cams is moved.

4. In a motor-controller in combination, a rheostat in themotor-circuit, a contact-piece in said circuit adapted to pass over thesame, a movable rack, a connection from the same including a rotatablewheel meshing with said rack and a link attached thereto and to amovable stop engaging said arm to cause said contact-piece to move oversaid rheostat and cut out the resistances thereof on a movement of saidrack in either direction.

5. In a motor-controller in combination, a rheostat in themotor-circuit, a contact-piece in said circuit adapted to pass over thesame and carried by a pivoted arm adapted to fall by gravity whenreleased, a dash-pot to control the speed of movement of said arm, amovable rack, a connection from the same to said pivoted arm to releasethe same and cause said arm to fall and move said contactpiece over saidrheostat to cnt out the resistances thereof on a movement of said rackin either direction.

6. In combination, a car, a device for moving the same including amotor, a rheostat in the motor-circuit, a switch adapted toautomatically move over said rheostat and cut out resistauces thereof, amain switch, a reversing-switch and reversing connections also in saidmotor-circuit, controlling means extending to said car and connectionstherefrom to said main and reversing switches adapted to close saidreversing-switch and then said main switch, a stop for saidrheostat-switch movable independently thereof and adapted to control theposition of said rheostat-switch on said rheostat, and a connectionbetween said controlling means and stop for moving the latter.

7. In combination, a car, a device for moving the same including amotor, a rheostat in the motor-circuit, a pivoted arm carrying a switchalso in the motor-circuit adapted to fall by gravity and move saidswitch over said rheostat and cut out resistances thereof, means forretarding the fall of said switcharm, a main switch, a reversing-switchand reversing connections also in said motor-circuit, controlling meansextending to said car and connections therefrom to said main andreversing switches to close said reversingswitch and then said mainswitch, a stop for said arm movable independently of and away from thesame and adapted to control the position of said rheostat-switch on saidrheostat, and a connection between said controlling means and stop formoving the latter to the desired position.

8. In combination, a car, a device for moving the same including amotor, a rheostat in the motor-circuit, a switch adapted toautomatically move over the same and cut out resistances thereof, a mainswitch, a reversingswitch and reversing connections also in saidmotor-circuit, controlling means extending to said car and connectionstherefrom to said main and reversing switches including a reci procatingrack adapted to close said reversing-switch and then said main switch,astop for said rheostat-switch movable independently thereof and adaptedto control theposition of said rheostat-switch on said rheostat, and aconnection between said rack and stop for moving the latter on amovement of said rack in either direction.

9. In a motor-controller in combination, a motor, a rheostat in themotorcircuit, a switch adapted to move over the same to cut out theresistances thereof, a reversing-switch also in said motor-circuit, amain switch adapted to open and close said circuit, a reciprocating rackand connections from the same to said three switches to close saidreversing-switch and then close said main switch and move saidrheostat-switch forward to decrease the resistance of the motorcircuit,on a movement of the rack in either direction.

lO. In a motor-controller in combination, a motor, a rheostatin themotor-circuit, a switch adapted to move over the same to cut out theresistances thereof, a reversing-switch also in said motor-circuit, amain switch adapted to open and close said circuit, a reciprocating rackand mechanical connections from the same to said three switches to closesaid reversing switch and then close said main switch and move saidrheostat-switch forward to decrease the resistance of the motor-circuiton a movement of the rack in either di rection.

ll. In an elevator mechanism in combination, a car adapted to beraisedand lowered in suitable guideways, hoisting means to raise saidcar including an electric motor, a rheostat including a series ofresistances in the IOO motor-circuit, a switch adapted to move over saidrheostat and cutout the resistances thereof thereby decreasing theresistance of said circuit and increasing the speed of the motor, areversing-switch also in said motor-circuit, a rack adapted to move ineither direction, and mechanical connections from the same to saidswitches to close said reversing-s Witch and then move saidrheostat-switch forward to decrease the resistance of the motor-circuiton a movement of said rack in either direction.

12. In a motor-controller in combination, a rheostat in themotor-circuit, a switch in said circuit adapted to travel over saidrheostat and cut out the resistances therein, and means to automaticallylock said switch in any position in its traverse when the motor-circuitis opened.

13. In a motor-controller in combination, a rheostat in themotor-circuit,a pivoted switcharm having a contact-piece in said circuitadapted to travel over said rheostat and cut out the resistancestherein, and means including a solenoid carried by said arm, a core forsaid solenoid and an electrical connection from said motor-circuitthrough said solenoid whereby said switch is automatically locked in anyposition in its traverse when the motor-circuit is opened.

14. In a motor-controller in combination, a rheostat in themotor-circuit,a pivoted switcharm having a contact-piece in said circuitadapted to travel over said rheostat and cut out the resistancestherein, and means including a solenoid carried by said arm, a'core forsaid solenoid having a tooth adapted to engage a stationary series ofteeth and an electrical connection from said motor circuit through saidsolenoid whereby said switch is automatically locked in any position inits traverse when the motor-circuit is opened.

15. In a motor-controller in combination, a switch in the motor-circuitincluding a terminal and a movable contact-piece, means to move saidcontact-piece to close said switch including a plurality of cams havingfaces making an angle with each other, an operating part located betweensaid faces and movable in either direction to strike and move one ofsaid cams and a connection between said cams and contact-piece wherebyit is moved toward said terminal when either of said cams is moved.

16. In a motor-controller in combination, a switch in the motor-circuitincluding a terminal and a movable contact-piece, means to move saidcontact-piece to close said switch including a plurality of pivoted armshaving faces making an angle with each other, an operating part locatedbetween said faces and movable in either direction to strike and moveone of said pivoted arms, and a connection between said pivoted arms andcontact-piece whereby itis moved toward said terminal when either ofsaid arms is moved.

17. In a motor-controller in combination, a switch in the motor-circuitincluding a ter- 6mes minal, a movable contact-piece and an arm carryingthe same, means to move said arm to close said switch including aplurality of cams having faces making an angle with each other, anoperating part located between said faces and movable in eitherdirection to strike and move one of said cams, and a connection betweensaid'cams and contact-piece whereby it is moved toward said terminalwhen either of said cams is moved.

18. In a motor-controller in combination, a switch in the motor-circuitincluding a terminal and a movable contact-piece, means to move saidcontact-piece to close and open said switch including a plurality ofcams having faces making an angle with each other, an operating partlocated between said faces and movable in eitherdirection to strike andmove one of said cams, and a connection between said cams andcontact-piece whereby it is moved toward said terminal when either ofsaid cams is moved, and a spring adapted to snap open said switch beforethe contact-piece leaves the terminal.

19. In a motor-controller in combination, a switch in tne motor-circuitadapted to open and close said circuit and including a terminal, apivoted arm and a contact-piece carried by said arm and adapted to makeelectrical connection with said terminal, means to move said arm, toopen and close said switch, in'

cluding a plurality of pivoted arms carrying intermeshing gears andhaving faces which make an angle with each other, an operating partlocated between said faces and movable in either direction to strike andmove one of said pivoted arms, a connection between said pivoted armsand contact-piece including a projection from one of said pivoted armswhich engages said rst arm whereby the latter is moved toward saidterminal when either of said cams is moved, and a spring adapted to snapsaid switch open after the contact-piece has been moved a short distancetoward the open position.

20. In a motor-controller in combination, a

switch in the motor-circuit including a terminal and a movablecontact-piece, means to move said contact-piece to close said switchincluding a plurality of cams having faces making an angle with eachother, an operating part located between said faces and movable ineither direction to strike and move one of said cams, a connectionbetween said cams and contact-piece whereby it is moved toward saidterminal when either of said calns is moved, a reversing-switch also inthe motor-circuit, and means to automatically close saidreversing-switch before the other switch is closed.

21. In a motor-controller in combination, a switch in the motor-circuitincluding a ter minal and a movable contact-piece, means to move saidcontact-piece to close said switch l including a cam having faces makingan angle with each other, an operating part located between said facesand adapted to strike the IOO los

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same and move said cam and switch in one direction or the other toreverse the motor connection.

22. In a motor-controller in combination, a switch in the motor-circuitincluding a terminal and a movable contact-piece, means to move saidcontact-piece to close said switch including a plurality of cams havingfaces making an angle with each other, an operating part located betweensaid faces and movable in either direction to strike and move one ofsaid cams, a connection between said cams and contact-piece whereby itis moved toward said terminal when either of said cams is moved, arheostat in the motor-circuit, a contact-piece also in said circuit andadapted to move over said rheostat, and means connecting with theaforesaid operating part and adapted to cause said rheostat andcontactpiece to move forward over the same to cnt out the resistancesthereof after said switch has been closed.

23. In an elevator mechanism in combination, a car, hoisting mechanismfor the same including an electric motor,a reversing-switch andconnections in said motor-circuit to reverse the direction of rotationof the armature of said motor, a second switch also in saidmotor-circuit adapted to open and close said circuit, a rheostat also insaid motorcircuit, a pivoted arm carrying a contactpiece and adapted toautomatically move over said rheostat to cutout the resistances thereof,a reciprocating rack, a toothed wheel meshing with said rack, a linkbetween said toothed wheel and pivoted arm wherebysaid contact-piece iscaused to move forward over said rheostat on a rotation of said wheel ineither direction, a pair of pivoted arms having sloping faces, and aconnection between said arms and main switch whereby the same may beclosed or opened by a movement of either arm, an operating part locatedbetween said faces and reciprocated by said rack to contact with andmove said sloping arms, and a connection from said rack to saidreversing-switch to close the same before said main switch is closed andon a movement of said rack in either direction.

Signed at New York, N. Y., this 17th day of December, 1900.

RUMSEY XV. SCOTT.

Witnesses:

EMERSON R. NEWELL, JOSEPH E. DIAMOND.

